My security question rescue email was entered wrong. How do I enter correct email address?

Manage your Apple ID primary, rescue, alternate, and notification email addresses

You need to answer your security questions to change the rescue address.

Forgotten Security Questions/Answers

You need to contact Apple by:

1 - Use the Express lane and start here:

https://expresslane.apple.com

then click More Products and Services>Apple ID>Other Apple ID Topics>Forgotten Apple ID security questions.

or

Apple - Support -form iTunes Store - Contact Us

2 - Call Apple in your country by getting the number from here: http://support.apple.com/kb/HE57

or

Apple ID: Contacting Apple for help with Apple ID account security

3 - Use your rescue email address if you set one up

Rescue email address and how to reset Apple ID security questions

For general information see:

Apple ID: All about Apple ID security questions